From c27616fc32ab918e6dd5e0fb763f1d9bddc960f9 Mon Sep 17 00:00:00 2001
From: Ryan Oldenburg <guzba8@gmail.com>
Date: Sun, 29 Nov 2020 15:52:53 -0600
Subject: [PATCH] fuzz jpg

---
 tests/fuzz_jpg.nim | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 tests/fuzz_jpg.nim

diff --git a/tests/fuzz_jpg.nim b/tests/fuzz_jpg.nim
new file mode 100644
index 0000000..da83af2
--- /dev/null
+++ b/tests/fuzz_jpg.nim
@@ -0,0 +1,17 @@
+import random, strformat, pixie/fileformats/jpg, pixie/common
+
+randomize()
+
+let original = cast[seq[uint8]](readFile("tests/images/jpg/jpeg420exif.jpg"))
+
+for i in 0 ..< 10_000:
+  var data = original
+  let
+    pos = rand(data.len)
+    value = rand(255).uint8
+  data[pos] = value
+  echo &"{i} {pos} {value}"
+  try:
+    discard decodeJpg(data)
+  except PixieError:
+    discard